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NXP Semiconductors NCF2951MTT/T0E080J
- Part No.:
- NCF2951MTT/T0E080J
- Manufacturer:
- NXP Semiconductors
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- -
- Datasheet:
-
NCF2951MTT/T0E080J.pdf
- Description:
- IC REMT KEYLSS ENT 125KZ 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,632
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Product details
Overview
NCF2951MTT/T0E080J from NXP Semiconductors is a fourth-generation keyless entry/go IC with integrated 3D security transponder, 16-bit RISC microcontroller core, 2 KB EEPROM, 16 KB EROM + 8 KB ROM, and 3-channel active 125 kHz LF interface for precise inside/outside vehicle detection in automotive access systems.
For engineers reviewing the NCF2951MTT/T0E080J datasheet, NCF2951MTT/T0E080J pinout, NCF2951MTT/T0E080J application, or NCF2951MTT/T0E080J equivalent, key selection considerations include LF sensitivity (3-channel active 125 kHz), UHF transmitter support, AES-128 crypto unit compatibility, TSSOP38 package constraints, and 3D transponder integration for secure car access authentication.
Technical Context
The NCF2951MTT/T0E080J implements a dedicated 16-bit RISC microcontroller architecture with hardware-accelerated multi-mode crypto unit supporting 96-bit and AES-128 protocols, enabling secure challenge-response authentication between vehicle basestation and key fob. It integrates a 3D active LF frontend (IN1P/IN1N, IN2P/IN2N, IN3P/IN3N) plus passive LF backup for immobilizer mode.
It features 21 I/O ports including 8 wake-up/button inputs, two SPI interfaces, three PWM outputs for RGB LED control, and on-chip temperature sensor, ADC, and RC oscillator - all optimized for ultra-low-power operation in battery-powered key fobs requiring long service life and fast RSSI-based localization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Microcontroller Core | 16-bit RISC with hardware crypto accelerator for AES-128 and 96-bit protocols |
| Memory | 2 KB EEPROM (non-volatile configuration), 16 KB EROM + 8 KB ROM (firmware/application storage) |
| LF Interface | 3-channel active 125 kHz frontend (IN1P/N, IN2P/N, IN3P/N) + 1-channel passive LF for immobilizer backup |
| I/O Capability | 21 general-purpose I/O ports, including 8 wake-up inputs and 2 SPI interfaces |
| PWM Outputs | 3 independent PWM channels for RGB LED status indication and user feedback |
| Package | TSSOP38 - 38-pin thin shrink small outline package, 0.5 mm pitch, 12.5 × 4.4 mm footprint |
Pinout & Package
TSSOP38 package with exposed thermal pad; 38-pin leaded surface-mount device optimized for compact key fob PCB layout and thermal management in sealed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1P / IN1N IN2P / IN2N IN3P / IN3N | 3D LF antenna differential inputs | Enable simultaneous 3-axis magnetic field sensing for accurate 3D position detection relative to vehicle door handle |
| P10–P13, P20–P24, P26–P27, P30–P34 | General-purpose I/O / Wake-up inputs | Support up to 8 button inputs or system control signals; configurable as interrupt sources for low-power wake-up |
| P14–P17 | SPI interface and clock | P14 (MISO), P15 (XCLK), P16 (MOSI), P17 (MSCL) - enable external EEPROM or sensor communication |
| VBAT / VBATA / VSSA / VDDC / VSS | Power supply and ground rails | Separate analog/digital domains ensure stable operation of LF frontend and microcontroller under varying battery voltage (2.2–3.6 V) |
Key Features
| Feature | Design Value |
|---|---|
| 3D Security Transponder Integration | Enables secure bidirectional authentication using 3-axis LF field measurement to verify key location inside/outside vehicle cabin |
| AES-128 Crypto Unit | Hardware-accelerated encryption ensures compliance with OEM-level security requirements for car access and immobilization |
| Ultra-Low-Power Architecture | Optimized sleep current <1 µA and fast wake-up (<10 µs) extend CR2032 battery life beyond 3 years in typical key fob use |
| RGB LED PWM Control | Three independent PWM outputs drive color-coded visual feedback without external driver ICs, reducing BOM count |
| Passive LF Backup Mode | Allows immobilizer function even with depleted battery by harvesting energy from vehicle's LF field during proximity detection |
Applications
| Automotive Key Fob | Vehicle Door Handle Module |
|---|---|
Use Scenario: Battery-powered remote key fob used for push-button unlock/start in passenger vehicles. IC Role / Device Role / Timing Role: Primary key-side controller executing LF wake-up, cryptographic challenge-response, and UHF transmission. Use Value: Integrated 3D transponder and AES-128 crypto eliminate need for discrete security IC, reducing component count and PCB area by >30%. | Use Scenario: Embedded module inside door handle housing performing LF field generation and signal processing. IC Role / Device Role / Timing Role: Vehicle-side LF basestation controller managing 3D field excitation, RSSI measurement, and authentication handshake timing. Use Value: 3-channel active LF interface enables precise angular localization of key fob, improving false-trigger immunity in multi-key environments. |
| Smart Entry System | Immobilizer Backup Interface |
Use Scenario: Integrated smart entry system combining keyless entry and passive entry functions in premium vehicles. IC Role / Device Role / Timing Role: Central key fob SoC coordinating LF detection, UHF response, and LED/user interface feedback via PWM. Use Value: On-chip RGB PWM drivers and 21 I/O ports allow direct connection to buttons, LEDs, and buzzer - eliminating 5+ external components. | Use Scenario: Fail-safe immobilizer path activated when key fob battery is critically low. IC Role / Device Role / Timing Role: Passive LF transponder interface operating in energy-harvesting mode during vehicle proximity scan. Use Value: Dedicated passive LF channel maintains immobilizer functionality without requiring separate transponder IC or additional PCB space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar keyless entry/go applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCF2952MTT/T0E080J | Lacks integrated 3D transponder; supports only 1D LF detection and UHF transmitter (no receiver) | Suitable for cost-sensitive key fobs where 3D localization is not required | Select when system design uses external UHF transceiver or omits inside/outside detection logic |
| PCF7953 | 8-bit core, lower memory (1 KB EEPROM, 8 KB ROM), no AES-128, single-channel LF frontend | Legacy keyless entry systems with basic challenge-response and no 3D positioning | Choose for backward-compatible upgrades where power budget allows higher active current |
Compared with NCF2951MTT/T0E080J, NCF2952MTT/T0E080J reduces system cost by removing 3D transponder logic but sacrifices precise spatial awareness; PCF7953 offers simpler firmware integration and lower gate count but lacks modern crypto and multi-axis LF capability required for OEM-grade go systems.
Availability
NCF2951MTT/T0E080J is available at Aetrix Electronics and suitable for automotive key fob design, vehicle door handle modules, smart entry systems, and immobilizer backup interfaces requiring stable component supply across production lifecycles.
Supply support for NCF2951MTT/T0E080J includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The ACTIC-4G product line - including NCF2951MTT/T0E080J - was engineered specifically for next-generation automotive keyless entry/go systems, integrating high-sensitivity 3D LF detection, secure crypto acceleration, and ultra-low-power operation in compact key fob form factors.
FAQ
What is the primary function of the NCF2951MTT/T0E080J in automotive keyless systems?
The NCF2951MTT/T0E080J serves as the core key-side controller in automotive keyless entry/go systems, executing LF wake-up, cryptographic challenge-response authentication, and UHF transmission. Its integrated 3D transponder enables precise inside/outside vehicle detection, and the AES-128 crypto unit ensures compliance with OEM security standards. The NCF2951MTT/T0E080J operates within strict power budgets to sustain multi-year battery life in CR2032-powered key fobs.
Does the NCF2951MTT/T0E080J support both active and passive LF modes?
Yes, the NCF2951MTT/T0E080J supports active 3-channel 125 kHz LF detection via IN1P/N, IN2P/N, and IN3P/N pins for real-time 3D field sensing, and includes a dedicated passive LF interface for immobilizer backup operation. This dual-mode capability allows the NCF2951MTT/T0E080J to maintain authentication functionality even when the key fob battery is depleted, using energy harvested from the vehicle's LF field.
What memory resources are available on the NCF2951MTT/T0E080J?
The NCF2951MTT/T0E080J provides 2 KB of EEPROM for non-volatile configuration storage, 16 KB of EROM and 8 KB of ROM for firmware and application code, and 512 bytes of RAM for runtime data handling. These memory resources support complex cryptographic routines, multi-stage authentication protocols, and customizable user interface logic - all essential for modern keyless go implementations using the NCF2951MTT/T0E080J.
How many I/O pins does the NCF2951MTT/T0E080J offer, and what are their key uses?
The NCF2951MTT/T0E080J provides 21 general-purpose I/O pins, including 8 configurable wake-up inputs for button presses or external event detection, two SPI interfaces (P14–P17), and three PWM outputs for RGB LED control. These I/O resources allow direct interfacing with mechanical buttons, status indicators, external sensors, and companion UHF transceivers - minimizing external logic and simplifying key fob PCB design around the NCF2951MTT/T0E080J.
Is the NCF2951MTT/T0E080J pin-compatible with earlier NXP keyless ICs like PCF7953?
No, the NCF2951MTT/T0E080J is not pin-compatible with PCF7953 due to architectural differences including increased pin count (38 vs. 32), reorganized LF input assignments, and new power domain separation (VBATA/VSSA). Migration from PCF7953 to NCF2951MTT/T0E080J requires PCB redesign and firmware adaptation to leverage its 16-bit core, AES-128 crypto, and 3D transponder features - all integral to the NCF2951MTT/T0E080J's enhanced security and localization capabilities.
NCF2951MTT/T0E080J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- -
- Frequency:
- 125kHz
- Standards:
- -
- Interface:
- SPI
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
NCF2951MTT/T0E080J FAQ
1.How can I place an order for NCF2951MTT/T0E080J through Aetrix?
Please submit a Request for Quotation (RFQ) for NCF2951MTT/T0E080J on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for NCF2951MTT/T0E080J reliable?
The price and inventory of NCF2951MTT/T0E080J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCF2951MTT/T0E080J is usually 5 days.
3.What payment methods are accepted for NCF2951MTT/T0E080J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCF2951MTT/T0E080J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCF2951MTT/T0E080J?
NCF2951MTT/T0E080J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCF2951MTT/T0E080J order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for NCF2951MTT/T0E080J?
For technical support, including NCF2951MTT/T0E080J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCF2951MTT/T0E080J requirements.
6.How does Aetrix verify that NCF2951MTT/T0E080J is sourced from the original manufacturer or authorized distributors?
All NCF2951MTT/T0E080J products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that NCF2951MTT/T0E080J meets industry standards.
7.What is the process for return or replacement of NCF2951MTT/T0E080J?
All NCF2951MTT/T0E080J units undergo pre-shipment inspection (PSI). If there is an issue with NCF2951MTT/T0E080J, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The NCF2951MTT/T0E080J part is unused and in its original packaging.
Return procedure for NCF2951MTT/T0E080J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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